Location
Crib Point,VIC
About
About Me:
Model aircraft pilot and electronics engineer for 20+ years. First autopilot about 15 years ago. Now building with Ardupilot-Mega
Please tell us a bit about your UAV interest
Want to turn the Ardupilot-Mega into a model aircraft training/safety system.
Activity Feed
"Here's a trip down memory lane.
System 80 (aka Genie / TRS80) with extra 32K ram chips piggy backed, and a Z80A upgrade from the Z80 --> Amstrad 6128 --> IBM XT (orig) --> 80286 (NEAT chipset) etc..
With some hardcore Z80, I recon the Amstrad would…"
System 80 (aka Genie / TRS80) with extra 32K ram chips piggy backed, and a Z80A upgrade from the Z80 --> Amstrad 6128 --> IBM XT (orig) --> 80286 (NEAT chipset) etc..
With some hardcore Z80, I recon the Amstrad would…"
"Well Darren, Jack - I'll take your comments as compliments. Esp when you see the age of the rest of my collection. I think my milling machine was made in about 1920.
But aside from this, I have recoded the RPM timers from scratch and included a…"
But aside from this, I have recoded the RPM timers from scratch and included a…"
Following on from my PPM Encoder mods (PPM Encoder Updated), I needed to be able to test and tune the main rotor speed controller. I figured that a small setup was needed to simulate the pulses generated by the RPM sensor, that was motor driven and…
After my RPM sensor additions to the PPM Encoder, it seems my MUX switch for enabling/disabling the Autopilot is not working. Some testing with a proportional channel (Throttle) revealed the MUX channel mid value to be about 2800, which is where I…
"What - microphone or RPM sensor ? The microphone I guess could sense engine RPM if the signal was processed right. The RPM sensor I need to keep the engine / rotor running at constant revs. With collective pitch, you want your lift controlled by…"
"Yeah - thanks guys. I tried a hall effect sensor I had in my collection, which was from an old tape drive motor, but it had some circuit inside and was setup for a specific magnetic field strength. I had the sensor mounted next to the bolt that…"
So today, I have got the updated PPM encoder s/ware working to do RPM measurement on one input channel. For an RPM range of about 300 - 2000, the output pulse to the AP CPU is ranging from 2mS to 0.5mS. The ACM code might need modding to accept…
"Wrong forum maybe ?
Anyway - Code is mod'd now. Refer to my blog."
Anyway - Code is mod'd now. Refer to my blog."
Many years ago, I tried building a model heli autopilot out of some old mouse position sensors, an 8031 micro, and my Hirobo shuttle. The whole thing seemed to work on the bench, but quickly broke a few blades when I slammed the throttle on for an…
HI All. I've been going through the PPM Encoder software, and its taking some time to understand it enough to answer this question. I have connected an RPM sensor (IR Opto through a hole in the main rotor shaft), to a spare input on my APM board…
